LOW ALLOY STEEL WITH A HIGH YIELD STRENGTH AND HIGH SULPHIDE STRESS CRACKING RESISTANCE

A steel contains, by weight: C: 0.3 to 0.5%, Si: 0.1 to 0.5%, Mn: 0.1 to 1%, P: 0.03% or less, S: 0.005% or less, Cr: 0.3 to 1.5%, Mo: 1.0 to 1.5%, Al: 0.01 to 0.1%, V: 0.03 to 0.06%, Nb: 0.04 to 0.15%, Ti: 0 to 0.015%, N: 0.01% or less, the remainder of the chemical composition of the steel being c...

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Bibliographic Details
Main Authors KULGEMEYER AXEL, LEYER JEAN, PIETTE MICHEL, BOSCH CHRISTOPH
Format Patent
LanguageEnglish
Russian
Published 31.03.2014
Subjects
ALLOYS
CHEMISTRY
FERROUS OR NON-FERROUS ALLOYS
METALLURGY
TREATMENT OF ALLOYS OR NON-FERROUS METALS
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Summary:A steel contains, by weight: C: 0.3 to 0.5%, Si: 0.1 to 0.5%, Mn: 0.1 to 1%, P: 0.03% or less, S: 0.005% or less, Cr: 0.3 to 1.5%, Mo: 1.0 to 1.5%, Al: 0.01 to 0.1%, V: 0.03 to 0.06%, Nb: 0.04 to 0.15%, Ti: 0 to 0.015%, N: 0.01% or less, the remainder of the chemical composition of the steel being constituted by Fe and impurities or residuals resulting from or necessary to steel production and casting processes. The steel enables to produce seamless tubes with a yield strength after heat treatment of 862 MPa or more which are particularly SSC-resistant. Сталь содержит, мас.%: С 0,3-0,5%, Si 0,1-0,5%, Мn 0,1-1%, Р 0,03% или меньше, S 0,005% или меньше, Cr 0,3-1,5%, Мо 1,0-1,5%, Al 0,01-0,1%, V 0,03-0,06%, Nb 0,04-0,15%, Ti 0-0,015%, N 0,01% или меньше, остальная часть химической композиции стали состоит из Fe и примесей или остатков, возникающих в результате осуществления процессов получения стали и литья или необходимых для этого. Сталь делает возможным получение цельнотянутых труб с прочностью на разрыв после термической обработки, равной 862 МПа или более, которые, в частности, являются стойкими к SSC.
Bibliography:Application Number: EA20110071096